What is used to provide a simple medium for gathering basic information about stories, recording high-level requirements, developing work estimates, and defining acceptance tests?

A team member has asked a question about the responsibilities of the product manager, QA, and the team regarding quality. What should the agile project manager advise?

An agile facilitator is helping a team. The team is taking too long in each daily coordination meeting, and the facilitator is beginning to view the time as unproductive. What should the agile facilitator do to help the team?

Which Agile method goes through the following stages:

Following chart lists stories for a release of an Agile project;
If the team completes Story A, Story B, and 50% of Story C for the first iteration, what is the team's velocity?